Signaling device for indicating fires or high-temperature conditions in room areas



2,569,062 -TEMPERATUREI Sept- 25, 1951 A. o. KJELDERGAARD SIGNALING DEVICE FOR INDICATING FIRES OR HIGH CONDITIONS IN ROOM AREAS Filed July 8, 1949 2 Sheets-Sheet l Inventor Albert 0. K b/dergaard Sept. 25, 1951 A. o. KJELDERGAARD 2,569,062 SIGNALING DEVICE FOR INDICATING FIRES OR HIGH-TEMPERATURE CONDITIONS IN ROOM AREAS Filed July 8, 1949 '2 Sheets-Sheet 2 Fig.5.

' Inventor Albert 0; k /dergaara Patented Sept. 25, 1951 j SIGNALINGDEVIGE FOR INDICATIN G FIRES R1- HIGHTEMBERATURE CONDITIONS IN ROOM AREAS;

Albert 0.'. Kjeldergaard, Bejou, .Minn.

Application July.r8;: 1949, Serial No. 103,696.-

9. Claims. (Cl. 116-106) This invention relates tonew and. useful im:-. provements in signaling; devices and the primary! object of the present invention-is to.provide'a.v devieeior indicating fires" or high temperature.

conditions in a furnace room or selected'room areas of-commercial or domestic;bui1ding;,estab-- lishments.

Another important object of the present;in--- VGII'tIOI'LiSttO provide a signaling device including; a spring; operated alarm having, a braking mechanism and a means responsive: to high item perature conditions for." releasing the. braking mechanism whereby the alarm will be sounded.

A furtherz'object'. ofthe :present; invention is to stalled and serviced, relatively" inexpensive to manufacture, andotherwiseiwell adapted forthe:

purposes for which thesameis' intended:

Other. objects. and" advantages'reside in the de-- tails of construction: andjaoperationi as :more; fully hereinafter described and claimed, reference be. ing had to'the accompanyingdrawings forming; part hereof; wherein like numerals refersto dike-r parts: throughout; and .inwhich:

Figure. 1 is a perspecive'zview' showing, the] present invention installed and ready foruse;

Figure 2 is. a. perspective view of the present invention, the hoodrremovedtherefrom Figure 3 is a perspective'view of theithermalresponsive member usedxin conjunction with the present invention, the'dust shield; removed there from;

Figure-4 is a. verticalrsectional view.-takensub-- stantially on the. plane-ofsection linen l -d of Figure 2 and showing, the; pivotal member as". holdingthe swingable member againstrthe base-:4

Figure 5 is a view similar :to. Figure randshowing the swingablemember released. from: the:

pivotal member; and:

Figure 6 is: a. vertical sectional view takensub- 1 stantially on the plane of section: line-6-6cof- Figure 2.

Referring now to the drawings :inidetail; whereein for the purpose. of illustrationythere isidis closed a preferrediembodiment .ofithe presentzinvention', the numeral 10. represents a spring operated or: springmotor drivenlalarrmincludinm- 2 a brake -mechanism that comprises abell-cranlr. lover I 2 having a locking dog or pawl Mat. one: endrand an eye [6 at its. otherend.

Aicoil-spring I8 is anchored at oneend to-a-u part of'thealarm and the other. end ofthecoil' spring [8 is secured to the pawl i l to urgethe pawLfromthe motor control ratchet: not the alarm. e

A plunger ZZ slidably received in an opening 24'- irrthealarm is pivoted as atZii-to the eye .end.of.-. the bell crank lever- 12. :An abutment 28. is meuntedonthe plunger-Hand acoil spring; 30 embraces the plunger and is biased-betweenabutrmerits 28 and. the. inner. wall .of the alarm for urging the plunger,- inwardly of the alarm and the. leverr [-2 to: a brake releasing. position.

The-alarm is. also provided with afinger grip, 32*. whereby the alarm spring motor M can be. placed in tension. When the motor for. thealarm. istinoperation,.thefinger grip tzwillrotate and. astriker. 3.4; will oscillate to strike a bell and.- sound an alarm..

The particular. type of drive mechanism, con-- sisting of aspring motor and gears for oscillating, the hammer or striker 34, is not shown, since. such drive mechanisms are well-knowmas. i1.- lustrated in patentsnumbered.543,896;298,981; and-428,160.

The. .alarm. HLis mounted on..a..support. 36 and. an.elongated.channe1 shaped base member 38 is. also mounted on the support.36. The inturned end portions. of..a. substantially. U -shaped member 4 0 extendthrough thelegpor-tions of a channel. shaped swinging member. 42 and enter suitable. apertures. provided in the. leg portions of the channellshaped .base. member. 38.

The leg portions of the member. 42. are notched, as..at 4-4, to receive the webof the member 40 and thelegportions of thebase member 38. are also notched,}as at..46, to receive the Web of the member. 4.0. whenthe member 42 is swungjnwardly against thebase member. Theweb of the .member 42 is providedwith a cut-out 48 (see Figure 2-) so thattlie 'member 42 can swing, without obstruction, relative to the'base member.

The leg portions of the base member 38 areprovided with registering slots 50 that slidably receive aguidebar 52. A guide pulley 54 is swiveled, asat 5B, tothe base member and-receives a signal operating. or actuating line 58. The line 58 is wrapped about the guide bar 52 and is also wrapped aboutand secured to the web of the U- shaped member 40 A latch orstoptmember En is pivoted by apin.

62 or the like, to the: base member.3.8. and includes.

an offset portion 64 that will bear against the web of the member 42 to hold the member 42 against the base member 38 and the line 58 in tension. A hook or loop 66 is formed at the outer free end of the member 60 and includes a bearing portion 68 that rests against the finger grip 32, see Figure 4, when the portion 64 bears against the web of the member 42. As the finger grip 32 rotates counterclockwise, as shown in Figure 4, the member 60 will gravitate or pivot downwardly so that the portion 64 will ride off the web of member 42 and the member 42 will swing downwardly to relieve the tension in the line 58.

The numeral represents a casing in which there is disposed a fusible element 12. Lines or wires 14 and 16 are fixed to the fusible element 12 and extend outwardly through aperture 18 and 80 provided in the casing 10. The line 14 is anchored to a structural element, such as a ceiling 82 and the line 16 is trained over a pulley 84 mounted on a bracket 86 depending from the support 36 and is secured to the plunger 22. It being understood that the lines 14 and 16 are in tension to move the plunger 22 against action of the springs 30 and I8 and force the pawl l4 into braking engagement with the ratchet 20.

' In practical use of the present invention the alarm l0, base member 38, and all parts mounted on the support 36 and the base member are enclosed in a hood 88 mounted on the support 36 and the support 36 is secured to a supporting structure, such as the ceiling 82, in a room area or furnace room.

In response in a high temperature condition about the casing 10, the fusible element 12 will expand or break relieving tension in the line 16 and the springs l8 and 30 will urge the pawl l4 out of braking engagement with the ratchet 20. As the pawl I4 disengages the ratchet 20 the alarm ID will be sounded and the finger grip 32 will rotate to permit the member 60 to swing downwardly to release the member 42. The member 42 will then pivot downwardly to relieve the tension in the line 58 that extends to a suitable signal or to the plunger 22 of another alarm such as the alarm l0.

Any suitable number of alarms, [0, may be used on the same hook-up and placed in various rooms or in a control room so that an attendant may be informed of high temperature conditions in a known room or rooms.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a prefered embodiment of the invention the same issusceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A signaling device comprising a spring operated alarm having a brake mechanism and a rotatable finger grip that is operatively connected to the spring of the alarm and which will rotate during the sounding of the alarm, means for holding the brake mechanism in a brake applying position, said means including a thermal responsive member, a signal operating line, and means actuated by the finger grip for urging the line to a signal operating position. 7

2. A signaling device comprising a spring operated alarm having a brake mechanism and a rotatable finger grip that is operatively connected to the spring of the alarm and which will rotate during the sounding of the alarm, means for holding the brake mechanism in a brake applying position, said means including a thermal responsive member, a signal operating line, a support for the alarm, a base member mounted on said support, a pivotal arm carried by the base member and secured to the line, and means carried by the brace member and actuated by the finger grip for holding the arm against the base member and the signal operating line in tension.

3. A signaling device comprising a spring operated alarm having a brake mechanism and a rotatable finger grip that is operatively connected to the spring of the alarm and which will rotate during the sounding of the alarm, means for holding the brak mechanism in a brake applying position, said means including a thermal responsive member, a signal operating line, a support for the alarm, a base member mounted on said support, a pivotal arm carried by the base member and secured to the line, and a swingable member mounted on the base member and engaging and holding the arm against the base member and the operating line in tension, said swingable member having a portion bearing against the finger grip, said portion being released from said finger grip as the latter rotates whereby the swinging member releases the arm so that it can swing freely.

4. A safety signal comprising a spring operated alarm having a brake mechanism and a rotatable finger grip that is operatively connected to the spring of the alarm will rotate during the sounding of the alarm, a line for holding the brake mechanism in a brake applying position when the line is in tension, a thermal responsive member connected to the line and responsive to heat for relieving tension in the line, a signal operating line adapted to hold a signal in an inoperative position when the said operating line is in tension, a base member for the alarm, means swingably carried by the base member for holding the signal operating line in tension, and means engaged by the finger grip for releasing said holding means, said last mentioned means including a latch member pivotally mounted on the base member and having a detent engaging the means for holding the line in tension and retaining the holding means against the base member.

5. A safety signal comprising a spring operated alarm having a brake mechanism and a rotatable finger grip that is operatively connected to the spring of the alarm will rotate during the sounding of the alarm, a line for holding the brake mechanism in a brake applying position when the line is in tension, a thermal responsive member connected to the line and responsive to heatfor relieving tension in the line, a signal operating line adapted to hold a signal in an inoperative position when'the said operating line is in tension, means for holding the signal operating line in tension, a swingable member having a portion contacting the finger grip, said portion being released from said finger grip as the latter rotates whereby the swingable member releases the holding means, said swingable member engaging the holding means when said portion contacts the finger grip, and a base supporting said means and said swingable member, said swingable member holding the means against the base.

6. In a signaling device including a spring operated alarm having a braking mechanism and a rotatable finger grip that is operatively connected to the spring of the alarm and which will rotate during the sounding of the alarm, a fusible member having first and second end portions, means anchoring the first portion of said fusible member to a supporting structure, a connector between the second end portion of said fusible member and said braking mechanism, said connector being in tension and urging the braking mechanism to its brake applying position, an alarm operating line, a base member, means carried by said base member receiving said line and including a pivotal member, a common support for the alarm and the base member, and a swingable latch mounted on the base member engaging and holding the pivotal member against the base member and the line in tension, said latch normally engaging the finger grip and being released from the finger grip moved to release the pivotal member during rotation of the finger grip.

'7. The combination of claim 6 wherein said means carried by said base member receiving said line includes a guide member, said base member having a pair of complemental slots slidably receiving said guide member.

8. In combination with a spring operated alarm including a finger grip that is operatively connected to the spring of the alarm and which will rotate during the sounding of the alarm, of a ing member against swinging movement and the line in tension, said latch member releasing said pivotal member during the rotation of the finger grip to release the swinging member and relieve the tension in the line.

9. A signal actuator comprising a base member, a swinging member pivoted to said base member for movement toward and away from said base member, a latch member also pivoted to said base member for movement toward and away from said base member and having a detent for overlying the swinging member to retain the swinging member against the base member, a guide bar slidably carried by said base member for movement toward and away from the swinging member, a signal operating line wrapped about the guide bar and attached to said swinging member, said line being in tension to pull the pin toward the swinging member when the swinging member underlies saiddetent, and means holding the latch member against swinging movement and the detent against the swinging member.

ALBERT O. KJELDERGAARD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 298,981 Judson May 20, 1884 528,160 Hackworth et a1. Oct. 30, 1894 1,219,951 Kamuf Mar. 20, 1917 1,440,743 Morrison Jan. 2, 1923 1,467,507 Schwengel Sept. 11, 1923 1,823,722 Birtciel Sept. 15, 1931 

